A novel route to titanium compounds containing cyclopentadienyl ligands with bromoethyl substituents; molecular structure of [(η5-C5H4CH2CH2Br)TiBr(μ-O)]4

Abstract Compounds ( η 5 -C 5 H 4 CH 2 CH 2 OCH 3 )TiCl 3 , ( η 5 -C 5 H 4 CH 2 CH 2 OCH 3 ) 2 TiCl 2 and ( η 5 -C 5 H 4 CH 2 CH 2 OCH 3 )( η 5 -C 5 H 5 )TiCl 2 react with BBr 3 to give a high yield of titanium compounds containing cyclopentadienyl ligands with bromoethyl substituents, ( η 5 -C 5 H 4 CH 2 CH 2 Br)TiBr 3 ( 1 ), ( η 5 -C 5 H 4 CH 2 CH 2 Br) 2 TiBr 2 ( 3 ) and ( η 5 -C 5 H 4 CH 2 CH 2 Br)( η 5 -C 5 H 5 )TiBr 2 ( 4 ), respectively. Hydrolysis of 1 in the presence of tert-butylamine affords cyclo -[( η 5 -C 5 H 4 CH 2 CH 2 Br)TiBr( μ -O)] 4 ( 2 ) in quantitative yield. The molecular structure of 2 was determined by X-ray diffraction.